Get ready for your mind to be blown. "Clueless" star Paul Rudd is turning 50! (We know, we can't believe it either!) In celebration of his milestone birthday on April 6, 2019, Wonderwall.com is taking a look at all our favorite '90s stars who've discovered the fountain of youth, starting with Paul. The "Ant-Man" actor looked as handsome as ever at the 2019 Academy Awards — more than 20 years after he attended the 1998 Met Gala. So how does Paul stay young? "In here, pure darkness," he jokingly said at the Chicago Comic & Entertainment Expo while pointing to his chest. "And a little moisturizer." Keep reading to check out more ageless wonders of the '90s…
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Is it possible to age in reverse? Regina King actually looks younger now, at 48, than she did at the 1996 premiere of "The Preacher's Wife."
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Mario Lopez might have ditched the '90s mullet, but his face looks exactly the same as it did during his "Saved By the Bell" days. Forever young!
Jennifer Lopez has clearly discovered the fountain of youth. Despite being nearly 50 years old, she looks just as amazing as she did back in 2000.
Reese Witherspoon still looks like the fresh-faced 20-something we came to know and love in the '90s. The 43-year-old actress and her almost-20-year-old daughter, Ava Phillippe, could pass as sisters.
Besides his trim-downed curls, Patrick Dempsey looks exactly the same as he did back in 1994. Still a total heartthrob at 53!
The only difference between these two pictures is Ricky Martin's new 'stache — oh, and 20 years! Can you believe Ricky is 47?!
Gabrielle Union is the definition of ageless beauty. The 46-year-old actress looks like she could still be on the high school cheer team.
Keanu Reeves must be a vampire. It's the only way to explain his incredibly ageless look at 54.
Salma Hayek was gorgeous back in 1996 and she's even more beautiful now. The 52-year-old star could pass for 25!
Can you believe these two photos were taken 23 years apart?! Jared Leto might be 47, but he can still pass for the 20-something we swooned over in the '90s.
Julia Roberts' hair color is the only thing that has changed since she took the photo on the left in 1992 — almost 27 years ago! Today, she's 51 and flawless.
Gwyneth Paltrow continues to be one of Hollywood's most stunning actress — she's barely aged a day since the '90s. Blonde bombshell!
You guys, Bianca Lawson might be the most ageless celeb we've ever seen. The 40-year-old actress has been playing teenagers for more than 20 years, most recently on Freeform's "Pretty Little Liars."
Elijah Wood might be 38 years old, but he still looks like the young teen he was back in the '90s.
Lucy Liu celebrated the big 5-0 in 2018 but her looks are virtually unchanged! We need her skincare routine ASAP.
Gwen Stefani might have ditched the '90s boho-punk hair and makeup, but she looks just as young as she ever did. The No Doubt frontwoman will unbelievably celebrate her 50th birthday in 2019!
Naomi Campbell is 48 years old and still dominating runways like she did in the '90s — thanks in part to her striking, ageless beauty.
Michelle Williams got her start in Hollywood as a teen and still looks as beautiful as ever. The 38-year-old actress has barely aged a day since 1999!
Shania Twain is 53 and fabulous! She's maintained her beautiful good looks since hitting the scene in the '90s.
Angela Bassett might be 60 years old (crazy, right?!) but she could easily pass for 30 with her ageless beauty.
Natalie Imbruglia was stunning back in 1993 and is equally as gorgeous in 2019 — 26 years later. The 44-year-old singer-actress needs to reveal her beauty secrets, stat!